MG · Insider Trading
Mistras Group Inc.
Every open-market purchase and sale reported by MG officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-07 | Aspasia Felice Vahaviolos | 10%+ Owner | G | +387,093 | — |
| 2026-09-22 | Gennaro A. D'Alterio | EVP, Chief Commercial Officer | F | −662 | −$13.74K |
| 2026-09-18 | Eileen Mary Coggins | Chief Legal Officer | F | −1,636 | −$32.16K |
| 2026-09-14 | Aspasia Felice Vahaviolos | 10%+ Owner | G | +387,093 | — |
| 2026-09-14 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | 10%+ Owner | G | −774,186 | — |
| 2026-09-09 | Natalia Shuman-Fabbri | President and CEO | F | −2,410 | −$46.80K |
| 2026-06-12 | Aspasia Felice Vahaviolos | 10%+ Owner | G | +411,875 | — |
| 2026-06-12 | 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | 10%+ Owner | G | −823,750 | — |
| 2026-06-04 | Aspasia Felice Vahaviolos | 10%+ Owner | G | +528,672 | — |
| 2026-06-04 | Stephanie Athena Foglia | 10%+ Owner | MIXED | −1,065,344 | −$123.40K |
| 2026-05-21 | Charles P Pizzi | Director | A | +6,862 | — |
| 2026-05-21 | Nicholas Debenedictis | Director | A | +6,862 | — |
| 2026-05-21 | James J Forese | Director | A | +6,862 | — |
| 2026-05-21 | Michelle Lohmeier | Director | A | +6,862 | — |
| 2026-05-21 | Richard H Glanton | Director | A | +6,862 | — |
| 2026-03-26 | Hanei Wail Hammad | EVP & Chief Operating Officer | F | −2,865 | −$43.26K |
| 2026-03-23 | Edward J Prajzner | Sr. EVP and CFO | F | −1,367 | −$19.21K |
| 2026-03-17 | Edward J Prajzner | Sr. EVP and CFO | F | −2,239 | −$32.71K |
| 2026-03-10 | Manuel N. Stamatakis | Executive Chairman | F | −814 | −$12.76K |
| 2026-03-10 | Edward J Prajzner | Sr. EVP and CFO | F | −3,238 | −$48.59K |
| 2026-03-10 | Gennaro A. D'Alterio | EVP, Chief Commercial Officer | F | −184 | −$2.89K |
| 2026-03-10 | Hanei Wail Hammad | EVP & Chief Operating Officer | F | −337 | −$5.28K |
| 2026-03-09 | Hanei Wail Hammad | EVP & Chief Operating Officer | MIXED | +23,378 | −$68.88K |
| 2026-03-06 | Natalia Shuman-Fabbri | President and CEO | A | +101,190 | — |
| 2026-03-06 | Manuel N. Stamatakis | Executive Chairman | A | +86,310 | — |
| 2026-03-06 | Edward J Prajzner | Sr. EVP and CFO | MIXED | +35,899 | −$19.91K |
| 2026-03-04 | Hanei Wail Hammad | EVP & Chief Operating Officer | MIXED | +23,378 | −$68.88K |
| 2026-03-04 | Eileen Mary Coggins | EVP, General Counsel | A | +7,242 | — |
| 2026-03-03 | Gennaro A. D'Alterio | EVP, Chief Commercial Officer | MIXED | +18,388 | −$23.18K |
| 2026-02-27 | Aspasia Felice Vahaviolos | 10%+ Owner | G | −5,251,358 | — |
| 2026-01-09 | Manuel N. Stamatakis | Executive Chairman | A | +40,000 | — |
| 2026-01-09 | Edward J Prajzner | Sr. EVP and CFO | F | −2,699 | −$34.14K |
| 2026-01-05 | Edward J Prajzner | Sr. EVP and CFO | F | −2,699 | −$34.14K |
| 2026-01-05 | Manuel N. Stamatakis | Executive Chairman | A | +40,000 | — |
| 2025-12-05 | Charles P Pizzi | Director | G | −2,150 | — |
| 2025-12-04 | Gennaro A. D'Alterio | EVP, Chief Commercial Officer | F | −475 | −$4.53K |
| 2025-10-01 | Eileen Mary Coggins | EVP & Chief Legal Officer | A | +15,000 | — |
| 2025-09-25 | Eileen Mary Coggins | EVP & Chief Legal Officer | Buy | +15,000 | +$143.25K |
| 2025-09-10 | Aspasia Felice Vahaviolos | 10%+ Owner | W | +2,217,087 | — |
| 2025-09-10 | Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust | 10%+ Owner | G | −4,685,578 | — |
| 2025-09-10 | Natalia Shuman-Fabbri | President and CEO | A | +25,000 | — |
| 2025-06-06 | Manuel N. Stamatakis | Executive Chairman | Buy | +10,000 | +$77.10K |
| 2025-05-21 | Michelle Lohmeier | Director | A | +14,447 | — |
| 2025-05-21 | James J Forese | Director | A | +14,447 | — |
| 2025-05-21 | Charles P Pizzi | Director | A | +14,447 | — |
| 2025-05-21 | Nicholas Debenedictis | Director | A | +14,447 | — |
| 2025-05-21 | Richard H Glanton | Director | A | +14,447 | — |
| 2025-03-20 | Michael C Keefe | EVP, General Counsel | F | −1,791 | −$17.75K |
| 2025-03-20 | Manuel N. Stamatakis | Executive Chairman | Buy | +10,000 | +$99.50K |
| 2025-03-20 | Edward J Prajzner | Sr. EVP and CFO | F | −3,418 | −$33.97K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Aspasia Felice Vahaviolos | 10%+ Owner | 2,160,790 | $45.90M |
| 2025 Irrevocable Two-Year Grantor Retained Annuity Trust of Aspasia F. Vahaviolos | 10%+ Owner | 1,413,430 | $30.02M |
| Stephanie Athena Foglia | 10%+ Owner | 1,412,329 | $30.00M |
| Manuel N. Stamatakis | Executive Chairman | 509,795 | $10.83M |
| Nicholas Debenedictis | Director | 273,820 | $5.82M |
| James J Forese | Director | 177,043 | $3.76M |
| Edward J Prajzner | Sr. EVP and CFO | 148,076 | $3.15M |
| Natalia Shuman-Fabbri | President and CEO | 123,780 | $2.63M |
| Michelle Lohmeier | Director | 99,223 | $2.11M |
| Michael C Keefe | EVP, General Counsel | 91,558 | $1.94M |
| Charles P Pizzi | Director | 73,480 | $1.56M |
| Richard H Glanton | Director | 71,241 | $1.51M |
| Hanei Wail Hammad | EVP & Chief Operating Officer | 61,777 | $1.31M |
| Gennaro A. D'Alterio | EVP, Chief Commercial Officer | 46,577 | $989.30K |
| Eileen Mary Coggins | Chief Legal Officer | 13,364 | $283.85K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the MG quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.